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Hetlioz - summary of medicine characteristics

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Summary of medicine characteristics - Hetlioz

1. NAME OF THE MEDICINAL PRODUCT

HETLIOZ 20 mg hard capsules

2. QUALITATIVE AND QUANTITATIVE COMPOSITION

Each hard capsule contains 20 mg tasimelteon.

Excipients with known effect

Each hard capsule contains 183.25 mg of lactose (as anhydrous) and 0.03 mg of Orange Yellow S (E110).

For the full list of excipients, see section 6.1.

3. PHARMACEUTICAL FORM

Hard capsule

Dark blue opaque, hard capsule (dimensions 19.4 mm x 6.9 mm) marked with ‘VANDA 20 mg’ in white ink.

4. CLINICAL PARTICULARS4.1 Therapeutic indications

HETLIOZ is indicated for the treatment of Non-24-Hour Sleep-Wake Disorder (Non-24) in totally blind adults.

4.2 Posology and method of administration

Posology

Dose and timing

The recommended dose is 20 mg (1 capsule) tasimelteon per day taken one hour before bedtime, at the same time every night.

HETLIOZ is intended for chronic use.

Elderly

No dose adjustment is recommended for individuals older than 65 years of age (see section 5.2).

Renal impairment

No dose adjustment is recommended for patients with renal impairment (see section 5.2).

Hepatic impairment

No dose adjustment is necessary for patients with mild or moderate hepatic impairment (see section 5.2). Tasimelteon has not been studied in patients with severe hepatic impairment (Child-Pugh Class C); therefore caution is recommended when prescribing tasimelteon to patients with severe hepatic impairment.

Paediatric population

The safety and efficacy of tasimelteon in children and adolescents aged 0 to 18 years have not been established. No data are available.

Method of administration

Oral use. Hard capsules should be swallowed whole. Avoid breaking as the powder has an unpleasant taste.

Tasimelteon should be taken without food; if patients eat a high-fat meal, it is recommended to wait at least 2 hours before taking tasimelteon (see section 5.2).

4.3 Contraindications

Hypersensitivity to the active substance or to any of the excipients listed in section 6.1.

4.4 Special warnings and precautions for use

After taking tasimelteon, patients should limit their activity to preparing for going to bed.

Caution should be used when administering tasimelteon in combination with fluvoxamine or other strong CYP1A2 inhibitors, particularly those which also inhibit other enzymes involved in the clearance of tasimelteon because of a potentially large increase in tasimelteon exposure and greater risk of adverse reactions (see section 4.5).

Caution should be used when administering tasimelteon in combination with rifampin or other CYP3A4 inducers because of a potentially large decrease in tasimelteon exposure with reduced efficacy (see section 4.5).

Patients should be instructed to initiate tasimelteon treatment without regard to circadian phase. Physicians should evaluate patient response to tasimelteon 3 months after treatment initiation utilising a clinician interview to assess their overall functioning with an emphasis on sleep-wake complaints.

Excipients

HETLIOZ hard capsules contain lactose. Patients with rare hereditary problems of galactose intolerance, total lactase deficiency or glucose-galactose malabsorption should not take this medicinal product.

HETLIOZ hard capsules contain the azo colouring agent Orange Yellow S (E110), which may cause allergic reactions.

This medicinal product contains less than 1 mmol sodium (23 mg) per hard capsule, that is to say essentially ‘sodium-free’.

4.5 Interaction with other medicinal products and other forms of interaction

Potential for other medicinal products to affect tasimelteon

CYP1A2 and CYP3A4 are enzymes identified to play a role in the metabolism of tasimelteon, with a minor role for CYP2C9/C19. Medicinal products that inhibit CYP1A2 and CYP3A4 have been shown to alter the metabolism of tasimelteon in vivo.

Strong CYP1A2 inhibitors (e.g. fluvoxamine, ciprofloxacin and enoxacin)

Caution should be used when administering tasimelteon in combination with fluvoxamine or other strong CYP1A2 inhibitors such as ciprofloxacin and enoxacin because of a potentially large increase in tasimelteon exposure and greater risk of adverse reactions: the AUC0-inf and Cmax of tasimelteon increased by 7-fold and 2-fold, respectively, when co-administered with fluvoxamine 50 mg (after 6 days of fluvoxamine 50 mg per day). This is deemed even more important for strong CYP1A2 inhibitors also inhibiting other enzymes involved in the clearance of tasimelteon (e.g. fluvoxamine and ciprofloxacin).

Strong CYP3A4 inhibitors (e.g. ketoconazole)

Tasimelteon exposure was increased by approximately 50% when co-administered with ketoconazole 400 mg (after 5 days of ketoconazole 400 mg per day). The clinical relevance of this single factor is unclear, but with increased exposure caution is recommended to monitor the patient.

Strong CYP3A4 inducers (e.g. rifampin)

Use of tasimelteon should be avoided in combination with rifampin or other CYP3A4 inducers because of a potentially large decrease in tasimelteon exposure with reduced efficacy: the exposure of tasimelteon decreased by approximately 90% when co-administered with rifampin 600 mg (after 11 days of rifampin 600 mg per day).

Smoking (moderate CYP1A2 inducer)

Tasimelteon exposure decreased by approximately 40% in smokers compared to non-smokers (see section 5.2). The patient should be instructed to cease or reduce smoking while taking tasimelteon.

Beta blockers

The efficacy of tasimelteon may be reduced in patients with concomitant administration of beta adrenergic receptor antagonists. Monitoring of efficacy is recommended where if efficacy is not achieved by a patient on beta blocker medication, the physician may consider whether a substitution of another non-beta-blocker medication for the beta blocker is warranted or discontinue the use of Hetlioz.

Potential effect of alcohol on tasimelteon

In a study of 28 healthy volunteers, a single dose of ethanol (0.6 g/kg for women and 0.7 g/kg for men) was co-administered with a 20 mg dose of tasimelteon. On some psychomotor test measures (intoxication, drunk, alertness/drow­siness, balance platform test), there was a trend towards greater effects of tasimelteon plus ethanol versus ethanol alone, but the effects were not deemed significant.

4.6 Fertility, pregnancy and lactation

Pregnancy

There are no or limited amount of data from the use of tasimelteon in pregnant women. In animal studies, administration of tasimelteon during pregnancy resulted in developmental toxicity (embryofoetal mortality, neurobehavioural impairment, and decreased growth and development in offspring) at doses greater than those used clinically. As a precautionary measure, it is preferable to avoid the use of tasimelteon during pregnancy.

Breast-feeding

It is unknown whether tasimelteon/me­tabolites are excreted in human milk. A risk to the breast-fed child cannot be excluded. A decision must be made whether to discontinue breast-feeding or to discontinue/abstain from tasimelteon therapy taking into account the benefit of breast-feeding for the child and the benefit of therapy for the woman.

Fertility

There are no data on the effects of tasimelteon on human fertility. Reproductive and developmental toxicity studies showed that oestrous cycles were prolonged in rats treated with high doses of tasimelteon, with no effect on mating performance or male fertility, and only a marginal effect on female fertility.

4.7 Effects on ability to drive and use machines

Tasimelteon may cause somnolence, and therefore may have an influence on driving and using machines. After taking tasimelteon, patients should limit their activity to preparing to go to bed and not use machines because tasimelteon can impair performance of activities requiring complete mental alertness.

4.8 Undesirable effects

Summary of the safety profile

The most common adverse reactions (>3%) during clinical trials were headache (10.4%), somnolence (8.6%), nausea (4.0%), and dizziness (3.1%). The most frequently reported adverse reactions were mostly mild to moderate in severity and transient in nature.

Adverse reactions leading to discontinuation occurred in 2.3% of tasimelteon-treated patients. The most frequent adverse reactions leading to discontinuation were: somnolence (0.23%), nightmare (0.23%), and headache (0.17%).

Tabulated list of adverse reactions

The following are adverse reactions that were reported in tasimelteon-treated adult patients, derived from patient trials in 1772 patients treated with tasimelteon. The following terms and frequencies are applied and presented by MedDRA System Organ Class: Very common (>1/10); Common (>1/100 to <1/10);

Uncommon (>1/1,000 to <1/100); Rare (>1/10,000 to <1/1,000); Very rare (<1/10,000). Within each frequency grouping, adverse reactions are presented in order of decreasing seriousness.

Table 1: Summary of Adverse Drug Reactions

System Organ Class

Very common

Common

Uncommon

Psychiatric disorders

Sleep disorder, insomnia, abnormal dreams

Nightmare

Nervous system disorders

Headache

Somnolence, dizziness

Dysguesia

Ear and labyrinth disorders

Tinnitus

Gastrointestinal disorders

Dyspepsia, nausea, dry mouth

Renal and urinary disorders

Pollakiuria

General disorders and administrative site conditions

Fatigue

Foggy feeling in head

Investigations

Alanine aminotransferase increased

Aspartate aminotransferase increased, gamma-glutamyl transferase increased

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via the national reporting system listed in Appendix V.

4.9 Overdose

There is limited clinical experience with the effects of an overdose of tasimelteon.

As with the management of any overdose, general symptomatic and supportive measures should be used, along with immediate gastric lavage, where appropriate. Intravenous fluids should be administered as needed. Respiration, pulse, blood pressure, and other appropriate vital signs should be monitored, and general supportive measures employed.

While haemodialysis was effective at clearing tasimelteon and the majority of its major metabolites in patients with renal impairment, it is not known if hemodialysis will effectively reduce exposure in the case of overdose.

5. PHARMACOLOGICAL PROPERTIES5.1 Pharmacodynamic properties

Pharmacotherapeutic group: Psycholeptics, melatonin receptor agonists, ATC code: N05CH03

Mechanism of action

Tasimelteon is a circadian regulator that resets the master body clock in the suprachiasmatic nucleus (SCN). Tasimelteon acts as a Dual Melatonin Receptor Agonist (DMRA) with selective agonist activity at the MT1 and MT2 receptors. These receptors are thought to be involved in the control of circadian rhythms.

The master body clock regulates the circadian rhythms of hormones including melatonin and cortisol and aligns/synchronises the physiological processes of the sleep-wake cycle and metabolic and cardiovascular homeostasis.

Pharmacodynamic effects

Tasimelteon functions as a DMRA at the MT1 and MT2 receptors. Tasimelteon exhibits a greater affinity for the MT2 as compared to the MT1 receptor. The most abundant metabolites of tasimelteon have less than onetenth of the binding affinity of the parent molecule for both the MT1 and MT2 receptors.

Tasimelteon and its most abundant metabolites have no appreciable affinity for more than 160 other pharmacologically relevant receptors. This includes the GABA receptor complex, the binding site for sedative hypnotics, and receptors that bind neuropeptides, cytokines, serotonin, noradrenaline, acetylcholine, and opiates.

Clinical efficacy and safety

The effectiveness of tasimelteon in the treatment of Non-24-Hour Sleep-Wake Disorder (Non-24) was established in two randomised, double-masked, placebo-controlled, multicentre, parallel-group studies (SET and RESET) in totally blind patients with Non-24.

In SET, 84 patients with Non-24 (median age 54 years) were randomised to receive tasimelteon 20 mg or placebo, one hour prior to bedtime, at the same time every night for up to 6 months.

RESET was a randomised withdrawal trial in 20 patients with Non-24 (median age 55 years) that was designed to evaluate the maintenance of efficacy of tasimelteon after 12-weeks. Patients were treated for approximately 12 weeks with tasimelteon 20 mg one hour prior to bedtime, at the same time every night. Patients in whom the calculated time of peak melatonin level (melatonin acrophase) occurred at approximately the same time of day (in contrast to the expected daily delay) during the run-in phase were randomised to receive placebo or continue daily treatment with tasimelteon 20 mg for 8 weeks.

SET and RESET assessed entrainment of the master body clock as measured by aMT6s and cortisol. Both studies demonstrated the ability of tasimelteon to entrain the master body clock in patients with Non-24 and RESET demonstrated that continued daily dosing of tasimelteon is necessary to maintain entrainment.

Entrainment in Non-24-Hour Sleep-Wake Disorder

In SET, tasimelteon entrained circadian rhythms at month 1 at a significantly higher rate than placebo as measured by aMT6s and cortisol (20% vs. 2.6 % and 17.5% vs 2.6% respectively). Analyses of entrainment at month 7 in a subset of patients demonstrated that 59% of tasimelteon-treated patients entrained by month 7 indicating that response to treatment may take weeks or months for some patients to respond. RESET demonstrated the maintenance of entrainment with tasimelteon treatment compared to placebo withdrawal (aMT6s: 90% vs. 20% and cortisol: 80% vs. 20%).

Clinical Response in Non-24-Hour Sleep-Wake Disorder

The effectiveness of tasimelteon in the treatment of clinical symptoms, including the circadian sleep-wake cycle and clinical global functioning in patients with Non-24 was established in SET and RESET. A composite scale of 4 measures of duration and timing of nighttime and daytime sleep and global functioning was used to evaluate clinical response in SET. Entrainment plus a score >3 on this scale, called Non-24 Clinical Response Scale (N24CRS) was required to be classified as a clinical responder. The components of the scale can be found in

Table 2:     Non-24 Scale of Clinical Response

Assessment

Threshold of Response

Nighttime sleep on 25% most symptomatic nights

>45 minutes increase in average nighttime sleep duration

Daytime sleep on 25% most symptomatic days

>45 minutes increase in average nighttime sleep duration

Timing of sleep

>30 minutes increase and a standard deviation <2 hours during double-masked phase

CGI-C

<2.0 from the average of Day 112 and Day 183 compared to baseline

Clinical response in sleep-wake amount and timing measures

SET and RESET evaluated the duration and timing of nighttime sleep and daytime naps via patient-recorded diaries. During SET, patient diaries were recorded for an average of 88 days during screening and 133 days during randomisation. During RESET, patient diaries were recorded for an average of 57 days during the run-in phase and 59 days during the randomised-withdrawal phase.

Because symptoms of nighttime sleep disruption and daytime sleepiness are cyclical in patients with Non-24, with severity varying according to the state of alignment of the individual patient’s circadian rhythm with the 24-hour day (least severe when fully aligned, most severe when 12 hours out of alignment), efficacy endpoints for nighttime total sleep time and daytime nap duration were based on the 25% of nights with the least nighttime sleep, and the 25% of days with the most daytime nap time. In SET, patients in the tasimelteon group had, at baseline, an average 195 minutes of nighttime sleep and 137 minutes of daytime nap time on the 25% of most symptomatic nights and days, respectively. The average timing of sleep relative to an individual’s de­sired period for consolidated sleep over at least one circadian period was assessed. Treatment with tasimelteon resulted in a significant improvement, compared with placebo, for all of these endpoints in SET and RESET (see.

Table 3:     Effects of Tasimelteon 20 mg Treatment on Clinical Response in Non-24

Tasimelteon 20 mg

Placebo

%

Difference

p-value

SET Study

Clinical response (Entrainment + N24CRS

>3)( 1)

9/38 (23.7)

0/34 (0.0)

23.7

0.0028

N24CRS > 3( 2)

11/38 (28.9)

1/34 (2.9)

26.0

0.0031

N24CRS > 2 (2)

22/38 (57.9)

7/34 (20.6)

37.3

0.0014

Nighttime sleep on 25% most symptomatic nights (minutes/ 3)

56.80

17.08

39.71

0.0055

Daytime sleep time on 25% most symptomatic days (minutes) (3),(4)

–46.48

–17.87

–28.61

0.0050

> 45 min improvement in both nighttime and daytime sleep (%) (5)

31.6

8.8

22.8

0.0177

Timing of sleep (minutes) (1),(3)

35.00

14.48

20.52

0.0123

RESET Study

Nighttime sleep on 25% most symptomatic nights (minutes/ 3)

–6.74

–73.74

67.00

0.0233

Daytime sleep time on 25% most symptomatic days (mmutes/ 3),(4)

–9.31

49.95

–59.25

0.0266

Timing of sleep (minutes)(1),(3)

19.99

–16.05

36.04

0.0108

(1) Higher numbers indicates improvement

(2) Sensitivity Analysis

(3) P-value was based on analysis of covariance model, units are LS mean minutes

(4) Lower numbers indicates improvement

(5) Post-hoc analysis

Response in Clinical Global Functioning Measures

Patients treated with tasimelteon experienced an overall improvement in clinical global functioning (CGI-C = 2.6) as compared to patients treated with placebo who showed no improvement status (CGI-C = 3.4) compared to the severity of Non-24 at baseline (LS mean difference = –0.8; p=0.0093). The effectiveness of tasimelteon to improve clinical global functioning was evaluated in SET. The Clinical Global Impression of Change (CGI-C) is a reflection of the general social, occupational, and health functioning of the patient and is evaluated on a 7-point scale, centered at No Change (4) , that investigators used to rate the patients’ improvement from baseline in symptoms of global functioning. It was rated as: 1 = very much improved; 2 = much improved; 3 = minimally improved; 4 = no change; 5 = minimally worse; 6 = much worse; or 7 = very much worse.

Table 4:     Clinical Global Functioning in Non-24 Patients

Tasimelteon 20 mg

Placebo

p-value

CGI-C (LS mean)

2.6

3.4

0.0093

See section 4.8 for safety information.

Paediatric population

The European Medicines Agency has deferred the obligation to submit the results of studies with HETLIOZ in one or more subsets of the paediatric population who are totally blind with Non-24. See section 4.2 for information on paediatric use.

5.2 Pharmacokinetic properties

The pharmacokinetics of tasimelteon is linear over doses ranging from 3 to 300 mg (0.15 to 15 times the recommended daily dosage). The pharmacokinetics of tasimelteon and its metabolites did not change with repeated daily dosing.

Absorption

The peak concentration (Tmax) of tasimelteon occurred approximately 0.5 hours after fasted oral administration. The mean absolute oral bioavailability of tasimelteon is 38%.

When administered with a high-fat meal, the Cmax of tasimelteon was 44% lower than when administered in a fasted state, and the median Tmax was delayed by approximately 1.75 hours. Therefore, tasimelteon should be taken without food; if patients eat a high-fat meal, it is recommended to wait at least 2 hours before taking tasimelteon.

Distribution

The apparent oral volume of distribution at steady state of tasimelteon in young healthy subjects is approximately 59 – 126 L. At therapeutic concentrations, tasimelteon is about 88.6 – 90.1% bound to proteins.

Biotransformation

Tasimelteon is extensively metabolised. Metabolism of tasimelteon consists primarily of oxidation at multiple sites and oxidative dealkylation resulting in opening of the dihydrofuran ring followed by further oxidation to give a carboxylic acid. CYP1A2 (35.4%) and CYP3A4 (24.3%) are the major enzymes identified to play a role in the metabolism of tasimelteon. CYP2C9 (18.8%) and CYP2C19 (15.1%) also contribute to the metabolism of tasimelteon. Tasimelteon clearance does not appear to be affected by polymorphisms in these enzymes.

Phenolic glucuronidation is the major phase II metabolic route.

Major metabolites had 13-fold or less activity at melatonin receptors compared to tasimelteon.

Elimination

Following oral administration of radiolabeled tasimelteon, 80% of total radioactivity was excreted in urine and approximately 4% in faeces, resulting in a mean recovery of 84%. Less than 1% of the dose was excreted in urine as the parent compound.

The observed mean elimination half-life for tasimelteon is 1.3 ± 0.4 hours. The mean terminal elimination half-life ± standard deviation of the main metabolites ranges from 1.3 ± 0.5 to 3.7 ± 2.2.

Repeated once daily dosing with tasimelteon does not result in changes in pharmacokinetic parameters or significant accumulation of tasimelteon.

Special populations

Elderly

In elderly subjects, tasimelteon exposure increased by approximately two-fold compared to non-elderly adults. Due to the overall inter-subject variability of tasimelteon, this increase is not clinically meaningful and dose adjustment is not recommended.

Gender

The mean overall exposure of tasimelteon was approximately 1.6-fold greater in female than in male subjects. Due to the overall inter-subject variability of tasimelteon, this increase is not clinically meaningful and dose adjustment is not recommended.

Race

Race does not affect apparent clearance of tasimelteon.

Hepatic impairment

The pharmacokinetic profile of a 20 mg dose of tasimelteon was compared among 8 subjects with mild hepatic impairment (Child-Pugh Score >5 and <6 points), 8 subjects with moderate hepatic impairment (Child-Pugh Score >7 and <9 points), and 13 healthy matched controls. Tasimelteon exposure was increased less than two-fold in subjects with moderate hepatic impairment. Therefore, no dose adjustment is needed in patients with mild or moderate hepatic impairment. Tasimelteon has not been studied in patients with severe hepatic impairment (Child-Pugh Class C); therefore caution is recommended when prescribing HETLIOZ to patients with severe hepatic impairment.

Renal impairment

The pharmacokinetic profile of a 20 mg dose of tasimelteon was compared among 8 subjects with severe renal impairment (estimated glomerular filtration rate [eGFR] < 29 mL/min/1.73m2), 8 subjects with endstage renal disease (ESRD) (GFR < 15 mL/min/1.73m2) requiring hemodialysis, and 16 healthy matched controls. There was no apparent relationship between tasimelteon CL/F and renal function, as measured by either estimated creatinine clearance or eGFR. Subjects with severe renal impairment had a 30% lower CL/F clearance than match controls; however, when variability is taken into account, the different was not significant. No dose adjustment is necessary for patients with renal impairment.

Smokers (smoking is a moderate CYP1A2 inducer)

Tasimelteon exposure decreased by approximately 40% in smokers, compared to non-smokers (see section 4.5). The patient should be instructed to cease or reduce smoking while taking tasimelteon.

5.3 Preclinical safety data

Non-clinical data revealed no special hazard for humans based on conventional studies of safety pharmacology, repeated dose toxicity, genotoxicity, carcinogenic potential, toxicity to reproduction and development.

Effects in non-clinical studies were observed only at exposures considered sufficiently in excess of the maximum human exposure indicating little relevance to clinical use.

Reproductive toxicology

In pregnant rats administered tasimelteon during the period of organogenesis, there were no effects on embryofoetal development. In pregnant rabbits administered tasimelteon during the period of organogenesis, embryolethality and embryofoetal toxicity (reduced foetal body weight and delayed ossification) were observed at the highest dose tested (200 mg/kg/day).

Oral administration of tasimelteon to rats throughout organogenesis and lactation resulted in persistent reductions in body weight, delayed sexual maturation and physical development, neurobehavioural impairment in offspring at the highest dose tested, andreduced body weight in offspring at the mid-dose tested. The no effect dose (50 mg/kg/day) is approximately 25 times the RHD on a mg/m2 basis.

Carcinogenesis

No evidence of carcinogenic potential was observed in mice; the highest dose tested is approximately 75 times the RHD of 20 mg/day, on a mg/m2 basis. In rats, the incidence of liver tumours was increased in males (adenoma and carcinoma) and females (adenoma) at 100 and 250 mg/kg/day; the incidence of tumours of the uterus (endometrial adenocarcinoma) and uterus and cervix (squamous cell carcinoma) were increased at 250 mg/kg/day. There was no increase in tumours at the lowest dose tested in rats, which is approximately 10 times the recommended human doseon a mg/m2 basis.

6. PHARMACEUTICAL PARTICULARS6.1 List of excipients

Hard capsule core

Lactose anhydrous

Microcrystalline cellulose

Croscarmellose sodium

Silica, colloidal anhydrous

Magnesium stearate

Hard capsule shell

Gelatin

Titanium dioxide

Brilliant Blue FCF

Erythrosine

Orange Yellow S (E 110)

White printing ink

Shellac

Propylene glycol

Sodium hydroxide

Povidone Titanium dioxide

6.2 Incompatibilities

Not applicable.

6.3 Shelf life 3 years

After first opening of the bottle: 30 days

6.4 Special precautions for storage

This medicinal product does not require any special temperature storage conditions.

Store in the original container and keep the bottle tightly closed in order to protect from moisture and light.

6.5 Nature and contents of container

High density polyethylene (HDPE) bottle containing 30 hard capsules with polypropylene child-resistant closures containing polypropylene resin induction seals. Each bottle also contains a 1.5 g silica gel desiccant canister and polyester dunnage.

Pack size: 30 hard capsules..

6.6 Special precautions for disposal

Any unused medicinal product or waste material should be disposed of in accordance with local requirements.

7. MARKETING AUTHORISATION HOLDER

Vanda Pharmaceuticals Netherlands B.V.

Prins Bernhardplein 200

1097 JB Amsterdam

The Netherlands

8. MARKETING AUTHORISATION NUMBER(S)

EU/1/15/1008/001

9. DATE OF FIRST AUTHORISATION/RENEWAL OF THE AUTHORISATION

Date of first authorisation: 3 July 2015

Date of latest renewal: 3 July 2020